dnl Process this file with autoconf to produce a configure script.
dnl configure.in for sys-mon created by torbjorn-sysmon@EU.net
dnl modified by jared mauch (jared@puck.nether.net)

dnl initialize
AC_INIT(src/config.h)
AC_CONFIG_HEADER(src/defines.h:autoconf/defines.h.in)
AC_PREREQ(2.10)
AC_PREFIX_DEFAULT(/usr/local)
AC_CONFIG_AUX_DIR(autoconf)
AC_PROG_MAKE_SET

dnl some new options to configure
AC_ARG_ENABLE(ssl, [ --disable-ssl  don't support ssl], , enable_ssl=yes)
AC_ARG_ENABLE(mail, [ --disable-mail  don't support mail], , enable_mail=yes)
AC_ARG_ENABLE(clients, [ --disable-clients  no clients], , enable_clients=yes)
AC_ARG_ENABLE(daemon, [ --disable-daemon  no daemon], , enable_daemon=yes)
AC_ARG_ENABLE(ipv6, [ --enable-ipv6  enable ipv6 support], , enable_v6=yes)

dnl search /usr/local/
AC_ADD_SEARCH_PATH(/usr/local/)

dnl find some programs
AC_PROG_CC
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PATH_PROGS(SENDMAIL, sendmail, no, $PATH:/usr/sbin:/usr/lib)
AC_PATH_PROGS(LEX, flex, no, $PATH:/usr/ccs/bin)
AC_PATH_PROGS(LEX, lex, no, $PATH:/usr/ccs/bin)

if test "$LEX" = no; then
    AC_MSG_WARN(without lex or flex sysmon may not compile but give it a try)
fi


dnl find some headers
AC_CHECK_HEADERS(paths.h)

dnl find some libraries
AC_CHECK_LIB(curses, refresh)
AC_CHECK_LIB(ncurses, refresh)
AC_CHECK_LIB(nsl, inet_ntoa)
AC_CHECK_LIB(fl, yywrap)
AC_CHECK_LIB(l, yywrap)
AC_CHECK_LIB(pthread, pthread_create)

if test "$ac_cv_lib_fl_yywrap" = no; then
	if test "$ac_cv_lib_l_yywrap" = no; then
		AC_MSG_WARN(We may not compile as we did not find yywrap.  I suggest installing flex. ftp://ftp.gnu.org/gnu/non-gnu/flex/)
	fi
fi

AC_CHECK_LIB(socket, getpeername)
AC_CHECK_LIB(resolv, gethostname)

AC_CHECK_FUNC(gethostbyname, GETHOSTBYNAME=true)
if test "$GETHOSTBYNAME" = "true"; then
        AC_DEFINE(HAVE_GETHOSTBYNAME, 1, [if exists])
fi

AC_CHECK_FUNC(gethostbyname2, GETHOSTBYNAME2=true)

if test "$GETHOSTBYNAME2" = "true"; then
	AC_DEFINE(HAVE_GETHOSTBYNAME2, 1, [if exists])
fi

AC_CHECK_LIB(c, snprintf, SNP="-DHAVE_SNPRINTF")
AC_CHECK_FUNC(snprintf, SNP="-DHAVE_SNPRINTF")
AC_CHECK_FUNC(_snprintf, SNP="-DHAVE_SNPRINTF")
AC_CHECK_LIB(bsd, revoke)

dnl net-snmp requires kstat on solaris usually
AC_CHECK_LIB(kstat, main, KSTAT="true")

dnl ssl related checks - plus snmp
AC_ADD_SEARCH_PATH(/usr/local/ssl)
AC_CHECK_LIB(ssl, main, SSL="-DHAVE_SSL")
AC_CHECK_LIB(crypto, main, CRYPTO_LIBS="-lcrypto")

if test -z "$SSL" ; then
        AC_MSG_WARN(without openssl SNMP may not work)
else
        SSL_LIBS="-lssl"
        if test "$KSTAT" = true; then
                LIBS="$LIBS -lkstat"
        fi
fi


AC_CHECK_LIB(wrap, hosts_ctl)

dnl idea from NewsCache's libwrap check
dnl libwrap
dnl AC_MSG_CHECKING([for hosts_ctl in -lwrap])
dnl ac_save_LIBS="$LIBS"
dnl LIBS="-lwrap $LIBS"
dnl AC_TRY_LINK([#include <tcpd.h>
dnl int allow_severity; int deny_severity;], [hosts_ctl();],
dnl AC_MSG_RESULT([yes])
dnl AC_DEFINE(HAVE_LIBWRAP)
dnl ac_cv_lib_wrap_hosts_ctl=yes,
dnl LIBS="$ac_save_LIBS"
dnl AC_MSG_RESULT([no])
dnl ac_cv_lib_wrap_hosts_ctl=no)
AC_CHECK_HEADERS(tcpd.h)


#AC_CHECK_HEADERS(netinet/icmp6.h,IPV6="ENABLE_IPV6")
AC_CHECK_HEADERS([sys/socket.h])
AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
[#if HAVE_SYS_TYPES_H
#include <sys/types.h>
# endif
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
# endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
])

# need SSL_LIBS/CRYOPTO_LIBS for linking in snmp
LIBS_SAVE="$LIBS"

LIBS="$LIBS $SSL_LIBS $CRYPTO_LIBS"

AC_CHECK_HEADERS(net-snmp/version.h,IS_NET_SNMP="yes")
if test "$IS_NET_SNMP" = "yes"; then
        AC_CHECK_LIB(snmp,snmp_open,USABLE_SNMP="yes")
        AC_CHECK_LIB(snmp,NetSnmpVersionInfo,USABLE_SNMP="yes")
        AC_CHECK_LIB(netsnmp,snmp_open,USABLE_NET_SNMP="yes")
else
	AC_CHECK_HEADERS(ucd-snmp/version.h,IS_UCD_SNMP="yes")
	if test "$IS_UCD_SNMP" = "yes"; then
       		AC_CHECK_LIB(snmp,snmp_open,USABLE_SNMP="yes")
        	AC_CHECK_LIB(snmp,NetSnmpVersionInfo,USABLE_SNMP="yes")
        	AC_CHECK_LIB(netsnmp,snmp_open,USABLE_NET_SNMP="yes")
	fi
fi

LIBS="$LIBS_SAVE"

if test "$USABLE_SNMP" = "yes"; then
       SNMP="-DENABLE_SNMP"
	LIBS="$LIBS -lsnmp"
fi
if test "$USABLE_NET_SNMP" = "yes"; then
       SNMP="-DENABLE_SNMP"
       LIBS="$LIBS -lnetsnmp"
fi


dnl ssl libs need to come after netsnmp in linkpath
LIBS="$LIBS $SSL_LIBS $CRYPTO_LIBS"

dnl some checks
if test "$SENDMAIL" = no; then
	AC_MSG_WARN(without sendmail there is no support for alert messages)
	SENDMAIL=-DMAIL=''
else
	SENDMAIL=-DMAIL='"'$SENDMAIL'"'
fi

#if test "$IPV6" = "ENABLE_IPV6"; then
#	IPV6=-DENABLE_IPV6
#else
#	IPV6=''
#fi


if test "$enable_v6" = yes; then
	IPV6='IPV6=-DENABLE_IPV6'
else
	IPV6=''
fi

if test "$enable_daemon" = yes; then
	PROGS="$PROGS sysmond"
else
	AC_MSG_WARN(daemon not compiled on user request)
fi

if test "$enable_clients" = yes; then
	PROGS="$PROGS sysmon"
else
	AC_MSG_WARN(clients not compiled on user request)
fi


dnl need these
AC_SUBST(SSL)
AC_SUBST(SENDMAIL)
AC_SUBST(PROGS)
AC_SUBST(IPV6)
AC_SUBST(SNMP)
AC_SUBST(SNP)
#AC_SUBST(LDFLAGS)

dnl write out the Makefile
AC_OUTPUT(src/Makefile:autoconf/Makefile.in)

dnl write out some helpful text
cat <<EOT

Configuration complete, now:
cd src
make 
make install

Then read ALL the documentation in docs/ :)

If this is your first time using sysmon, please register it.  That can
be done by typing:
make register

If you have problems, or have questions that are not in the docs,
send e-mail to sysmon-help@sysmon.org
EOT